What level of accuracy should we be looking for in a caliper to measure base to ogive etc?

I've wondered about this too. While I really do like precision that a high quality tool (like the Mitutoyo) provides as well as durability and longevity, it seems like the way we use them for loading that like with the use of a comparator, getting the same or repeatable measurements is what's import and not so much the actual accuracy of the measurement. . . ???

What level of accuracy should we be looking for in a caliper to measure base to ogive etc?

I've wondered about this too. While I really do like precision that a high quality tool (like the Mitutoyo) provides as well as durability and longevity, it seems like the way we use them for loading that like with the use of a comparator, getting the same or repeatable measurements is what's import and not so much the actual accuracy of the measurement. . . ???

I agree with you on the actual measurement vs repeatability. Problem I had with cheaper calipers was they would drift giving a different measurement for the same item at different times. The same applies in my mind for powder charges. I don’t care if my charge says 37.7 but actually weighs 40 so long as it’s repeatable and I’m not concerned with the actual weight. Problem is cheaper scales, or any measuring device tend to drift around. That’s been my experience anyway.